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Top Forums Shell Programming and Scripting what does echo $$ command display Post 302109452 by dennis.jacob on Tuesday 6th of March 2007 01:32:06 AM
Old 03-06-2007
Is it a homework ?

The $$ variable holds the process ID of the script in which it appears.
 

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ECHO(1) 								FSF								   ECHO(1)

NAME
echo - display a line of text SYNOPSIS
echo [OPTION]... [STRING]... DESCRIPTION
NOTE: your shell may have its own version of echo which will supercede the version described here. Please refer to your shell's documenta- tion for details about the options it supports. Echo the STRING(s) to standard output. -n do not output the trailing newline -e enable interpretation of the backslash-escaped characters listed below -E disable interpretation of those sequences in STRINGs --help display this help and exit --version output version information and exit Without -E, the following sequences are recognized and interpolated: NNN the character whose ASCII code is NNN (octal) \ backslash a alert (BEL)  backspace c suppress trailing newline f form feed new line carriage return horizontal tab v vertical tab AUTHOR
Written by FIXME unknown. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for echo is maintained as a Texinfo manual. If the info and echo programs are properly installed at your site, the command info echo should give you access to the complete manual. GNU coreutils 4.5.3 February 2003 ECHO(1)
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